Develop Reference

How to hide a dynamically created EditText box in android?

I want to make an attendance plus tasking system. For this, I have used check-boxes and a linear layout. Linear layout is for adding edit-text box dynamically. When a check-box is checked, a new text field is to be visible and when it is unchecked, the text field has to be hidden. I have used part of code something like this:
public void onCheckBoxClicked(View v) {
boolean checked = ((CheckBox) v).isChecked();
EditText tv;
tv = new EditText(this);
tv.setLayoutParams(new RadioGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT,
RadioGroup.LayoutParams.WRAP_CONTENT));
tv.setText(one.getText().toString()+ "'s task today?");
tv.setBackgroundColor(0xff66ff66); // hex color 0xAARRGGBB
tv.setPadding(20, 20, 20, 20);// in pixels (left, top, right, bottom)
switch (v.getId()) {
case R.id.checkBox1:
if(checked) {
list.addView(tv);
Toast.makeText(getApplicationContext(), one.getText().toString() + " is present", Toast.LENGTH_SHORT).show();
}
if(!checked) {
tv.setVisibility(EditText.GONE); //problem exists here--is not executing
Toast.makeText(getApplicationContext(), one.getText().toString() + " is absent", Toast.LENGTH_SHORT).show();
}
break;
Now, I can easily get a edit-text field when I check the box but, on unchecking it, the edit-text field doesn't hide. How can I solve it?

This is because you are creating new EditText each time some checkBox clicked. You are trying to hide EditText which isn't even shown/added yet. Got it!!
Try making your EditText tv = new EditText(this); editText as class variable , create it in onCreate. And then you can hide/show when you need it.
it would look something like below code.
EditText tv;
onCreate(.......){
..............
tv = new EditText(this);
..............
}
and then use this tv in your onCheckBoxClicked method instead of creating one in this method.

filling in text views from shared preferences in a scroll view

Im a bit stuck on the best way to implement this so here I am.
I have a list of shared preferences with a label and a price. My app, a sort of calculator if you will, I would like to load the shared preferences in this way but stuck on how to implement it properly so ill wrote it down in a very literal way
Load shared preferences "item1"
Load into textView1 if empty
if it is full then try textview2,
if it is full then try textview3,
etc etc
I would like a function which loads preference 1, attempts to load it into a view and if its full, try the next textview and so on until it finds and empty slot. and then try the next shared preference item
Maybe I'm looking at this wrong but without writing out tons of if/else statements to get the job done, I cant see a way that makes sense.
I've seen somewhere some code to increment the textview numbers in a loop until a case is met but cant seem to recall it anywhere. this would reduce the code a lot if this was implemented properly I'm sure.The app I'm creating will display a list of selected items from another screen,save selected to shared preferences and then load the list on the results screen to give a total based on the sums attached to the items loaded.
I have no actual code to give you as im still prototyping this section and have nothing solid to show you.
any pointers welcome or any nod in the right direction would be handy.
thanks guys

You could add TextViews dynamiclly through java.
public class DynamicAvtivity1 extends Activity {
TextView tv;
EditText et;
Button btn;
LinearLayout ll;
int i;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
i = 1;
ll = new LinearLayout(this);
ll.setOrientation(1);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT , LayoutParams.FILL_PARENT);
final LinearLayout.LayoutParams lp2 = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT , LayoutParams.WRAP_CONTENT);
ll.setLayoutParams(lp);
tv = new TextView(this);
tv.setText("Enter Name");
tv.setLayoutParams(lp2);
ll.addView(tv);
et = new EditText(this);
et.setHint("Name");
et.setLayoutParams(lp2);
ll.addView(et);
btn = new Button(this);
btn.setLayoutParams(lp2);
btn.setText("Add Button");
btn.setLayoutParams(lp2);
ll.addView(btn);
btn.setOnClickListener(new View.OnClickListener() {
#SuppressLint("NewApi") #Override
public void onClick(View v) {
// TODO Auto-generated method stub
Button b = new Button(getApplicationContext());
b.setLayoutParams(lp2);
b.setText("Button " + i++);
b.setTextColor(Color.BLACK);
b.setBackground(btn.getBackground());
ll.addView(b);
}
});
setContentView(ll);
}
}

Android: Dynamically create image button with click event

I'm new to android and I require to have a list of image buttons in an activity which are created based on the data in a database. I haven't created anything like this in android before and so far I've been using HTML tables to show my data in a grid view. I'm not asking for any special code, I'm just clueless on how to implement this. I wanna know what the best approach is.
One problem I've faced is with the click events(in the way I've been doing them so far) which do not take in any EventArg, so I can't get the name of the button out of them.

If you're sure that the OnClickListener instance is applied to a Button, then you could just cast the received view to a Button and get the text:
public void onClick(View v) {
// 1) Possibly check for instance of first
Button b = (Button)v;
String buttonText = b.getText().toString();
}

// create the layout params that will be used to define how your button will be displayed
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
// Create Button
final Button btn = new Button(this);
// Give button an ID
btn.setId(someinteger);
btn.setText("Add Text");
// set the layoutParams on the button
btn.setLayoutParams(params);

How can I change Text of Textview from other funcion?

this is my first question so I hope to make it clear.
I have one textView with some numerical text and next to it one button with one click listener and what I want is that when you click on the button the numerical value (>=0) of the TextView decrements in one.
Here is part of my code:
TextView Counter = new TextView(this);
if (intSeries != 0)
Counter.setText(Integer.toString(intSeries));
else
Counter.setText("0");
Counter.setId(4);
tablaContador.addView(Counter,Tr);
Button Done = new Button(this);
Done.setText("-1");
if (intSeries != 0)
Done.setVisibility(View.VISIBLE);
else
Done.setVisibility(View.GONE);
Done.setId(6);
Done.setOnClickListener(this);
And this is the onClick funcion (part of it):
#Override
public void onClick(final View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case 6:{
TextView text = (TextView)findViewById(4);
int series = Integer.parseInt(text.getText().toString());
series--;
text.setText(series);
if (series==0){
Button boton = (Button)findViewById(6);
boton.setVisibility(View.GONE);
}
}
}
}
The error is when I try to make the setText inside the onClick function, I hope it can be fixed or maybe recieve other idea to do it.
Thank you so much.

I would avoid all this hardcoding of Ids, use resources instead.
Your call to
text.setText(series)
is passing an int. The only valid setText(int resId) overload expects a resource associated with the int value, i.e. a string resource.
Convert your series value to a string.
Something like:
text.setText(Integer.toString(series));

You should setup series as an integer. And increase/descrease it as you wish. When you want to change the button's text convert the int to String.
Instead of:
text.setText(series);
use:
text.setText(String.valueOf(series));

Variablenames in java can't start with a capital letter. That is reserved for classnames.
Counter -> counter
Done -> done

I tried this and it worked:
//Create onClickListener
OnClickListener pickChoice = new OnClickListener()
{
public void onClick(View v)
{
TextView txt = (TextView) findViewById(4);
int number = Integer.valueOf(txt.getText().toString());
txt.setText(String.valueOf(number -1));
}
};
//Create layout
LinearLayout lnLayout = new LinearLayout(this);
lnLayout.setOrientation(LinearLayout.VERTICAL);
TextView txt = new TextView(this);
txt.setId(4);
txt.setText("0");
lnLayout.addView(txt);
Button Done = new Button(this);
Done.setText("-1");
Done.setId(6);
Done.setOnClickListener(pickChoice);
lnLayout.addView(Done);
setContentView(lnLayout);
Where are you creating your button inside? an activity? the part where you pass the onClickListener to the button doesn't make sense, maybe the button is getting a wrong listener and gets you an error every time you press the button ?
The code should be easy to understand, if there is anything you need me to explain please ask :)

dynamic create editbox in android?

I want to create a Editbox dynamically when i click a add button and i also want to get the values typed in that Editbox when i click in save button.
Please Help me. Regards. Augustine

Try out this:
LinearLayout mLinearLayout = new LinearLayout(this);
mLinearLayout = (LinearLayout)findViewById(R.id.mylinearlayout);
Button lButton = (Button)findViewById(R.id.mybtnid);
lButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
EditText lEditText = new EditText(this);
lEditText.SetText("Text Here");
mLinearLayout.addView(lEditText);
}
}

To get the values typed into the EditText, you need to additionally set an identifier for the view.
lEditText.setId(2); //you can use any integer ID
Then, you can retrieve the text inside the OnClickListener of the save button as:
EditText lEditText = (EditText)findViewById(2);
String txt = lEditText.getText().toString();

To create an edit text dynamically or programmatically:
EditText ed = new EditText(context);
Set whatever parameters you want to set for this edit text and then add this in your view:
view.addView(ed);
OR
view.addView(ed, layoutParams);

you can create EditText with the following code inside your Activity
EditText _edit = new EditText(this);
Then to add this to you activity layout you have to get the particular layout by it id
For Ex.
LinearLayout linear = (LinearLayout)findViewById(R.id.linear);
then simple add this EditText object to the LinearLauout by using the following code..
linear.addView(_edit);